Simultaneously tuning and powering multiple wirelessly powered devices
Simultaneously tuning and powering multiple wirelessly powered devices
复制标题
同时调谐多个无线供电设备并为其供电
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Joshua R. Smith
中科院分区：
文献类型：
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作者：
Benjamin H. Waters;Peter Fidelman;Jeffrey D. Raines;Joshua R. Smith
用于消费者设备的无线充电标准包括用于同时对多个接收设备充电的规范。然而，如果设备不是全部相同的尺寸或者如果它们需要不同的功率量，则这些现有标准可能无法有效地对多个设备进行充电。本文概述了一个完整的无线电力传输系统，该系统能够自动调谐，通信，并有效地供电多个单电池充电接收设备。使用频率跟踪、功率跟踪和自适应阻抗匹配来动态地调谐每个接收器和所发射的信号，以用于向每个接收器的最佳功率递送。另外，这些相同的调谐技术用于演示时分复用，其中，各个接收设备被顺序地供电，而所有其他接收设备被解调谐并且不消耗任何功率，即使在存在发射线圈的情况下。
Wireless charging standards for consumer devices include specifications for charging multiple receive devices simultaneously. However if the devices are not all the same size or if they require different amounts of power, these existing standards may be incapable of charging multiple devices efficiently. This paper provides an overview of a complete wireless power transfer system that is capable of automatically tuning, communicating with, and efficiently powering multiple single-cell battery charging receive devices. Frequency tracking, power tracking, and adaptive impedance matching are used to dynamically tune each receiver and the transmitted signal for optimal power delivery to each receiver. Additionally, these same tuning techniques are used to demonstrate time-division multiplexing, where individual receive devices are powered sequentially while all other receive devices are de-tuned and do not consume any power, even in the presence of the transmit coil.